Spy Guy is determined to become a good, sneaky spy, but he cannot do it without the help of his father, the Chief.

When Lulu's parents go on vacation, the formidable Ms. Sonia Sofia Solinsky comes to babysit and Lulu behaves as badly as possible to get her to leave until Ms. Solinsky reveals her secret.

When evil Dr. Glockenspiel threatens all the books in the world, only one person can stop him--a book-wielding, super-secret operative called Lyric McKerrigan.--

While trying to stop thieves from getting the last known canisantha plant for an unknown purpose, eight-year-old Intergalactic Security Force deputy Archie is mistaken for someone very important and directed by his trainer, Pockets the cat, to go on a spy mission aboard a B.U.R.P. ship.

In their second trip through the enchanted library, the new key lands Cleo and Evan in the middle of a spy story, where their impossible mission is to stop a traitor who calls himself Viper--and they find themselves working with the replacement librarian, Ms. Crowley, whose exact role in their adventures is becoming increasingly mysterious.